JSME International Journal Series B Fluids and Thermal Engineering
Online ISSN : 1347-5371
Print ISSN : 1340-8054
ISSN-L : 1340-8054
Numerical Simulation of Jets Emitted into a Two-Dimensional Channel with Self-Induced Oscillation : Active Control by Neural Network Observer
Sei-ichi IIDAKakuji OGAWARASatoshi TAKEZAWA
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1998 Volume 41 Issue 4 Pages 840-846

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Abstract

Active control of jets emitted into a two-dimensional channel with insulated suction near the wall during monitoring with a neural network is described. The aim of this work is to simulate the possibility of controlling the flow pattern with a flip-flop phenomenon by suitable suction. In this case, the output of a neural network is estimated satisfactorily based on 3 flow patterns of teaching data. The periodic flow pattern at the Reynolds number Re=1.0×103 is reduced by a suction rate of less than 10% for primary jets. Then flow becomes stable as a result of feedback gain of the neural network. Since the control with suction need not be continuous, the power cost is reduced. The nonperiodic case at Re=1.0×104 is difficult to control, but we achieved good control by with the use of a suitable suction rate with the neural network.

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© The Japan Society of Mechanical Engineers
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